"Integrity" is urging people to vote for a Republican who endorsed John Kerry? (Unless good ol' fieldmarshaldj is wrong, which he probably isn't)
Not "integrity." STUPIDITY. It is stupid to keep voting for leftist Republicans on the false pretense that "hurts" leftism.
Just to confirm that he did, I present the DailyKOS article from 10 years ago...
http://www.dailykos.com/story/2004/10/29/66228/-Former-GOP-Sen-Bob-Smith-endorses-Kerry